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Ubuntu Security Notice USN-1800-1
April 15, 2013

haproxy vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10

Summary:

HAProxy could be made to crash or run programs if it received specially
crafted network traffic.

Software Description:
- haproxy: fast and reliable load balancing reverse proxy

Details:

It was discovered that HAProxy incorrectly handled configurations where
global.tune.bufsize was set to a value higher than the default. A remote
attacker could use this issue to cause a denial of service, or possibly
execute arbitrary code. (CVE-2012-2942)

Yves Lafon discovered that HAProxy incorrectly handled HTTP keywords in TCP
inspection rules when HTTP keep-alive is enabled. A remote attacker could
use this issue to cause a denial of service, or possibly execute arbitrary
code. (CVE-2013-1912)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.10:
  haproxy                         1.4.18-0ubuntu2.1

Ubuntu 12.04 LTS:
  haproxy                         1.4.18-0ubuntu1.1

Ubuntu 11.10:
  haproxy                         1.4.15-1ubuntu0.1

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1800-1
  CVE-2012-2942, CVE-2013-1912

Package Information:
  https://launchpad.net/ubuntu/+source/haproxy/1.4.18-0ubuntu2.1
  https://launchpad.net/ubuntu/+source/haproxy/1.4.18-0ubuntu1.1
  https://launchpad.net/ubuntu/+source/haproxy/1.4.15-1ubuntu0.1